Starters for fogging, spraying, heating and like apparatus



W. DURR ET AL May 8, 1962 STARTERS FOR FOGGING, SPRAYING, HEATING AND LIKE APPARATUS Filed Jan. 19, 1960 HEQM/IN/V HNSEL AW'AM/ May 8, 1962 w. DURR ET AL 3,033,

STARTERS FOR FOGGING, SPRAYING, HEATING AND LIKE APPARATUS Filed Jan. 19, 1960 2 SheetsSheet 2 mum/mp5.-

murae 302/2 HEEMfi/UN HMSEL.

r firmeuey 3,033,276 Patented May 8, 1962 ice 3,033,276 STARTERS FOR FOGGING, SPRAYING, HEATING AND LIKE APPARATUS Walter Diirr, Uberlingen, and Hermann Ansel, Beuren,

uber Leutkirch, Germany, assignors to Fir-ma Heizmotoren G.m.b.H., Uberlingen (Bodensee), Germany Filed Jan. 19, 1960, Ser. No. 3,349 Claims priority, application Germany, Jan. 20, 1959 4 Claims. (Cl. 15828) The present invention relates to improvements in starters for apparatus operating on the principle of the pulse jet, such as certain types of fogging, spraying, heating and like devices. Such types of apparatus utilize a starter assembly including an electric igniter and a hand pump whose purpose is to subject the fuel to a certain initial pressure necessary in the ignition process.

An important object of the present invention is to provide an improved starter assembly for certain fogging, spraying, heating and like apparatus which comprises a hand operated air pump and a magneto ignition system, and which is constructed in such a way that the pump and the ignition system may be operated simultaneously by a single actuating member.

Another important object of the invention is to provide a starter assembly of the above outlined characteristics which is of very compact and light-weight construction and which, therefore, may be readily installed in portable fogging, spraying, heating and like apparatus.

A further object of the invention is to provide a starter assembly of the above described type which embodies a novel arrangement capable of transforming reciprocating movements of an actuating member for the hand pump into rotary movements of the armature forming part of the magneto for the ignition system.

A concomitant object of the instant invention is to provide a starter assembly of the just outlined characteristics which embodies an interrupter system operatively coupled with the actuating member and adapted to furnish ignition impulses at different intervals whose frequency may be controlled by the operator of the apparatus in which the starter is installed.

With the above objects in view, the invention resides essentially in the provision of a hand pump comprising an elongated cylinder containing a piston which is reciprocalble by an elongated rod-shaped actuating member, the latter being shiftable in its longitudinal direction but being prevented from rotation with respect to the cylinder. The actuating member is utilized for reciprocating the pump piston and for simultaneously rotating the rotor or armature of a magneto which latter further comprises a stationary core supporting a coil arrangement and means for producing in the coil arrangement at least one ignition impulse during each revolution of the armature. The actuating member is coaxial with and traverses the armature of the magneto; its reciprocating axial movements may be transformed into rotary movements of the armature by an arrangement including one or more helical grooves formed in the periphery of the actuating member and at least one follower for each groove non-rotatably connected to the armature and extending into the corresponding groove to rotate the armature by sliding in its groove when the actuating member is reciprocated by hand, e.g. by means of a knob or another handgrip member. The pitch of the groove or grooves in the periphery of the actuating member at least equals but preferably exceeds the diameter of the actuating member.

The novel features which are considered as characteristic of the inveniton are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following detailed description of a specific embodiment when read in connection with the accompanying drawings, in which:

FIG. 1 is a longitudinal section through the starter assembly embodying the invention;

FlG. 2 is a transverse section taken along the line II-II of FIG. 1, as seen in the direction of arrows;

FIG. 3 is an end view of the starter assembly as seen in the direction of the arrow C shown in FIG. 1, with the cover removed and the actuating member broken away; and

FIG. 4 is side elevational View of a fogging or spraying apparatus which utilizes the starter assembly of this invention, the starter assembly being shown partially in the sectional veiw of FIG. 1 but on a greatly reduced scale.

Referring now in greater detail to the drawings, and first to FIGS. 1 to 3, there is shown a starter assembly which compriscsan air pump and a magneto both operable by a single actuating member. The pump comprises an elongated hollow cylinder 10 wlL'ch houses an axially reciprocable piston 11. The latter is connected with the forward end of an actuating member here shown as an elongated push rod 12 of circular cross section which is operable by a handgrip member in the form of a spherical knob 18. Adjacent to the piston 11, the rod 12 is formed with two ground axially parallel peripheral faces 13 (only one can be seen in FIG. 1) which are slidable in a noncircular, e.g. rectangular, cutout 1'4 provided in a transverse disc shaped partition or wall 15 mounted in the pump cylinder 10. The wall 15 and the faces 13 prevent the rod 12 from rotation during axial displacements in the cylinder 10.

The purpose of the push rod 12 is to produce the necessary starting fuel pressure in the internal combustion engine of the spraying, fogging or like apparatus by reciproeating the piston 11 in the cylinder 10. In addition, the rod 12 simultaneously operates a magneto which is mounted on a plate-like carrier member 26 having a bore for the rod 12. The carrier member 20 is connected to and seals the open rear end of the cylinder 10. A laminated magnet core 21 is rigidly fixed to the mounting plate or carrier member 26 by a number of screws 21a. The yoke 22 of the core 21 carries A coil arrangement which consists of a primary winding 23 and a high-tension secondary winding 24. The primary winding 23 comprises a comparatively small number of convolutions made of a heavy-gauge wire. The secondary winding 24 consists of a thin wire which is wound into a large number of convolutions surrounding the convolutions of the primary winding. One terminal of the primary winding is conductively connected with the core 21; its other terminal and one terminal of the secondary winding 24 are led through a common insulating sheath 25 and this other terminal is connected to a two-armed contact breaking or interrupting lever 26. This lever is pivotable about a pin 26a which is fixed to the clamping plate 52, the latter also supporting a fixed contact 27 which is conductively connected with the magnet core 21. The contact 27 is normally in abutment with one arm of the lever 26 but the latter is pivotable away from the member 27 by a cam arrangement which will be presently described. A condenser 25a in shunt with the contacts is shown in FIG. 3.

The upper part of the core 21 is formed with a pair of shanks 21b, 21c defining therebetween a cylindrical space which houses the rotor or armature of the magneto. This armature comprises an I-shaped permanent magnet 31, two diametrically opposed pole shoes or pieces 32, 33, and two front or end plates 37, 38. The pole pieces 32,

3 33 abut against the opposite sides of the magnet 31 (see FIG. 2) and are held in such position by the end plates 37, 38 which are adjacent to the ends of the magnet 31 and are connected to each other by preferably tubular rivets 39 passing through the pole pieces. The armature consisting of just described parts 31-33 and 37-39 is press fitted onto a cylindrical sleeve 4b which extends through aligned bores formed in the magnet 31 and end plates 37, 38 and is rotatable about the push rod 12. The sleeve 44} non-rotatably supports an annular interrupter cam 42 which is fixed thereto by a radial screw 41 and whose lobe 42a is adapted to engage and pivot the horizontal arm of the lever 26 to interrupt the electric connection between the vertical arm of this lever and the stationary contact 27.

The means for rotating the armature in response to axial movements of the push rod 12 comprises a pair of spiral grooves 45, 46 formed in the periphery of the member 12; as shown in FIG. 1, the pitch of these grooves approximates or equals two diameters of the push rod and is preferably always more than a single diameter of the member 12. The sleeve 4t} carries two diametrically opposed inwardly extending follower studs 47, 48 projecting into the grooves 45, 46, respectively; therefore, whenever the rod 12 performs an axial movement, the followers 47, 48 slide in their respective grooves 45, 46 and rotate the sleeve 40 together with the armature of the magneto. The sleeve 40 rotates in two spaced journal boxes 50, 51 the former of which is mounted in the carrier member 20 and abuts against the front face of the end plate 37. The second or rear journal box 51 is received in the clamping plate 52. which latter covers the rear end plate 38 and is rigidly connected to the core. The entire magneto is installed in the space between the carrier member 20 and a cupped cover 20a which latter is removably fixed to the member 20 and is formed with an aperture r bore 2% for the actuating rod 12.

When the starting assembly consisting of the pumping device and of the magneto is operated by the reciprocating rod 12, the latter rotates the armature including the magnet 31 whereby a magnetic flux passes from the magnet 31 to the laminated iron core 21 to thread with the turns of the coil arrangement 23, 24 and to thereby produce current streams in the primary winding 23 as long as the vertical arm of the lever 26 remains in conductive contact with the member 27. However, as the cam 42 participates in rotation of the sleeve 40, its lobe 42a periodically pivots the lever 26 away from the contact 27 and thus interrupts the flow of electric current through the primary winding 23 to thereby induce an ignition voltage impulse in the high-tension secondary winding 24. Such impulses are transmitted through a conduit 58 to the spark plug 59 (see FIG. 4) to start the ignition cycle of the engine in the apparatus in which the novel starter assembly is installed.

An important advantage of the just described starter assembly is that it constitutes a very compact and comparatively simple unit which, as can be observed in FIG. 4, occupies little space in a fogging, spraying or like apparatus. In addition, the handgrip member 18 at the rear end of the actuating rod 12 may be utilized for simultaneously actuating the air pump 1t 11 as well as the magneto located in the space within the cover 20a whenever an operator desires to start the pulsating combustion process in the apparatus in which the starter assembly is installed.

The apparatus, in the form of a portable spraying or fogging device, is shown in FIG. 4 with the novel starter assembly illustrated in partial section similar to that of FIG. 1. The apparatus comprises a tank 53 for the spraying solution, a fuel tank 54 for the engine 60, a fog mixing tube 55 which is surrounded by a tubular cooling jacket 56, and a supply line 57 which connects the tank 53 with the forward end of the mixing tube 55. As can be observed in FIG. 4, the cylinder of the air pump simultaneously serves as a handle for the apparatus by being mounted in two brackets 61, 62 which extend upwardly from the solution tank 53. A conduit 63 connects a non-return air valve M at the forward end of the pump cylinder in with an air pressure jet 65 which is mounted on the carburetor pressure balancing chamber 66. The exact construction of the fogging or spraying apparatus shown in FIG. 4, apart from the novel starter assembly including the air pump and the magneto, forms no part of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic and specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. A starter assembly comprising, in combination: a pump including an elongated hollow cylinder, a piston reciprocably received in said cylinder, and an elongated rod-shaped actuating member having one end connected to said piston and another end formed with a handgrip member for axially moving the actuating member together with the piston relative to said cylinder; and a magneto including a stationary core having a yoke, a coil arrangement on said yoke, an armature rotatably mounted in the core and coaxially surrounding said actuating member, said armature comprising a permanent magnet and a sleeve received in the magnet and rotatably mounted on the actuating member, means operatively connecting the sleeve with said actuating member in such a way that axial movements of the actuating member bring about rotational movements of the sleeve together with said magnet, said connecting means comprising at least one spiral groove formed in the periphery of said actuating member and a follower connected to said sleeve and projecting into said groove, and means for producing hightension current impulses in said coil arrangement, said last mentioned means comprising a cam connected to and rotatable with said sleeve, a fixed contact conductively connected with said core, and a pivotable lever in the path of said cam, said lever conductively connected with said coil and normally engaging with said contact, said cam pivoting the lever away from engagement with said contact at least once during each revolution of said sleeve to thereby induce an ignition impulse in said coil arrangement.

2. A starter assembly comprising, in combination: a pump including an elongated hollow cylinder, a piston reciprocably received in said cylinder, an elongated rodshaped actuating member having one end connected to said piston and another end formed with a handgrip member for axially moving the actuating member together with the piston relative to said cylinder, and means for holding the actuating member against rotational movements with respect to said cylinder; and a magneto including a stationary core having a yoke, a coil arrangement on said yoke, an armature rotatably mounted in the core and coaxially surrounding said actuating member, said armature comprising a permanent magnet and a sleeve received in the magnet and rotatably mounted on the actuating member, means operatively connecting the sleeve with said actuating member in such a way that axial movements of the actuating member bring about rotational movements of the sleeve together with said magnet, said connecting means comprising at least one spiral groove formed in the periphery of said actuating member and a follower connected to said sleeve and projecting into said groove, and means for producing hightension current impulses in said coil arrangement, said last mentioned means comprising a cam connected to and rotatable with said sleeve, a fixed contact conductively connected with said core, and a pivotable lever in the path of said cam, said lever conductively connected with said coil and normally engaging with said contact, said cam pivoting the lever away from engagement with said contact at least once during each revolution of said sleeve to thereby induce an ignition impulse in said coil arrangement.

3. A starter assembly comprising, in combination: a pump including an elongated hollow cylinder, a piston reciprocably received in said cylinder, an elongated rodshaped actuating member having one end connected to said piston and another end formed with a handgrip memher for axially moving the actuating member together with the piston relative to said cylinder, said actuating member having at least one axially parallel face adjacent to said first mentioned end thereof, and a transverse partition in said cylinder formed with a cutout for permitting the passage of said actuating member in such manner that said face and said partition hold the actuating member against rotation with respect to said cylinder; and a magneto including a stationary core having a yoke, a coil arrangement on said yoke, an armature rotatably mounted in the core and coaxially surrounding said actuating memher, said armature comprising a permanent magnet and a sleeve received in the magnet and rotatably mounted on the actuating member, means operatively connecting the sleeve with said actuating member in such a way that axial movements of the actuating member bring about rotational movements of the sleeve together with said magnet, said connecting means comprising at least one spiral groove formed in the periphery of said actuating member and a follower connected to said sleeve and projecting into said groove, and means for producing hightension current impulses in said coil arrangement, said last mentioned means comprising a cam connected to and rotatable with said sleeve, a fixed contact conductively connected with said core, and a pivotable lever in the path of said cam, conductively connected with said coil, and normally engaging with said contact, said cam pivoting the lever away from engagement with said contact at least once during each revolution of said sleeve to thereby induce an ignition impulse in said coil arrangement.

4. A starter assembly comprising, in combination: a pump including an elongated hollow cylinder having a rear end, a piston reciprocably received in said cylinder, and an elongated rod-shaped actuating member extending through the rear end of and into said cylinder, said actuating member having a forward end connected to said piston and a rear end formed with a handgrip member for axially moving the actuating member together with the piston relative to said cylinder; a carrier member connected to the rear end of said cylinder; a magneto including a stationary core having a yoke and supported by said carrier member, a coil arrangement carried by said yoke, an armature rotatably mounted in the core and coaxially surrounding said actuating member, said armature comprising a permanent magnet and a sleeve received in the magnet and rotatably mounted on the actuating member, means operatievly connecting the sleeve with said actuating member in such a way that axial movements of the actuating member bring about rotational movements of the sleeve and of said magnet, and means for producing high-tension current impulses in said coil arrangement, said last mentioned means comprising a cam connected to and rotatable with said sleeve, a fixed contact conductively connected with said core, and a pivotable lever in the path of said cam, said lever conductively connected with said coil and normally engaging with said contact, said cam pivoting the lever away from said contact at least once during each revolution of the sleeve to thereby induce an impulse in said coil arrangement; and a cover removably connected with said carrier member for enclosing said magneto.

References Cited in the file of this patent UNITED STATES PATENTS 2,430,057 Kiekhaefer Nov. 4, 1947 2,513,051 Ray June 27, 1950 2,710,524 Frank et al June 14, 1955 2,836,036 Drage May 27, 1958 2,896,704 Aleweld July 28, 1959 2,926,855 Durr et a1 Mar. 1, 1960 FOREIGN PATENTS 20,986 Great Britain -of 1907 

